How do you replace the DRL relay for a 2000 Pontiac Sunfire?

The 2000 Pontiac Sunfire doesn't have a dedicated Daytime Running Light (DRL) relay in the traditional sense like some other vehicles. The DRL function is usually integrated into the body control module (BCM) or, less commonly, controlled directly by the headlight switch and its internal circuitry. There isn't a separate relay you can simply swap out.

Therefore, if your DRLs aren't working, troubleshooting involves checking these areas:

1. Fuses: Start by checking the relevant fuses in the fuse box (usually under the hood and/or inside the cabin). Consult your owner's manual to locate the fuse(s) responsible for the headlights and/or DRLs. A blown fuse is the easiest and cheapest fix.

2. Headlight Switch: A faulty headlight switch could be the culprit. The switch might be internally damaged and not sending the correct signal for DRL operation. Replacement might be necessary.

3. Body Control Module (BCM): This is the most complex and potentially expensive option. The BCM controls many electrical functions, including DRLs. A malfunctioning BCM will require diagnosis by a mechanic or auto electrician. It's unlikely to be a simple relay replacement scenario.

4. Wiring: Check the wiring harness leading to the headlights for any damage, breaks, or loose connections. Look for corrosion or chafing.

5. Headlight Bulbs: Ensure the headlight bulbs themselves are functioning correctly. While unlikely to be the sole cause of DRL failure, a blown bulb *could* prevent the system from functioning correctly depending on the car's design.

In summary: You won't find a separate DRL relay to replace on a 2000 Pontiac Sunfire. Troubleshooting must focus on the items listed above, starting with the simplest (fuses) and progressing to the more complex (BCM). If you're not comfortable working on car electrical systems, it's best to take your vehicle to a qualified mechanic.